Settling-tank.



R. W. DULL.

SETTLING TANK.

APPLICATION FILED MAY 17, 1909.

Patented Oct. 10, 1911 2 SHEETSSHEET 1.

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yer/701:

SETTLING TANK.

APPLICATION FILED MAY 17, 1909.

2 SHEETSSHEET 2.

agoooooooooooooooooonfi FML 'I I Qikw em for: 5L 4 fi W To all whom it may concern:

I UNITED STATES PATENT Wren.

RAYMOND W. DULL, OF AURORA. ILLIfNOIS, ASSIGNOR T0 STEPHENS-ADAMSON MFG. 60., 0F AURORA 'ILLINQIS, A CORPORATION OF ILLINOIS.

- SETTLING-TANK.

Specification'of Letters Patent.

Patented Oct. 10, 1911.

Application filed May 17, 1909. Serial No. 496,518.

Be it known that I, RAYMOND \V. DULL, a citizenof the United States of America, and resident of Aurora, Kane county; Illinois, have invented a certain new and useful Improvement in Settling-Tanks, of which the following is a specification.

My invention relates to tanks for separating sand or gravel from water. The muddy water containing sand or gravel is (118- charged into the tank, and the water flows off in one direction while the sand' or gravel is discharged by itself in another direction. The general operation of atank of this kind is well understood.

Generally stated, the object of my invention is the provision of an improved and highly etlicient settling tank of 'the-aforestated eneral character.

Special objects are the provision of an improved construction and arrangement whereby" no fixed valves or equivalent devices will he. nceessaryfor discharging the sand or gravel; the provision of an improved construction and arrangement whereby no dividing partitions will be ne c essa ry for. the.tankthat is to say, whereby no ballast or ballasting-chamber will be nee' essary for the operation of the tank; to provide an improved construction and arrange merit-whereby the tilting of the tank is not essential to the operation thereof; to provide an improved construction and arrangement whereby no auxiliary frame with sand and water spouts is necessary in the-use of the tank for recovering sand or gravel from muddy water; and the provision of certain details and. features of improvement and comhiimtions tending to inereasethc general etiicicncy of a settling tank of this particular character. I

To the foregoing and other useful ends, my invention consistsin matters hereinafter set forth and claimed.

In the accompanyingdrawingsFigure lfis a front elevation of a settling tank 'cnr bodying the principles of my invention. Fig. 2 is an enlarged detail sectional view of the valve mechanism thereof. Fig. 3 ,is an enlarged fragmentary sectional view of the watenspout of the said tank.- Fig. 4: is

a view similar to Fig. 1, showing another form of my invention. Fig. 5 is a; side clevation of the tank shown in either Fig. 1

-or-.Fig. 4:,the two being similar in appearopen position. The said casting 7' ancewhen viewed from the side. Fig. 6 is adetail fragmentary View of the lower por tron of the tank, showing the valve mechanism open.

As thus illustrated, and referring more particularly to Fig. 5, my invention coinprises a tank A provided with a vertical when one edge is worn out. The edges of these trunn ons are adapted to rest in bearings' B on the parallel frame .bcams C, between which latter the tank isdisposed for operation. It will be seen that these trim nions a may be and preferably are as near the upper and rear end of thetanlc as ossible whereby the entire tank is adapts to swing up and down about an axis at. its rear end, as distinguished from a tilting motion. The rear end of the tank is provided with a discharge-spout D for the waten'and across its top a halite-plate E is disposed in position to divide the upper area of the tank transversely, in the manner illustrate-:1. The lower end of the tank provided on the front face thereof with a discharge opening F, which latter is normally closed by a, pivoted valve f. This valve is pivoted at upper end at), being mounted upon a casting P, which latter has an adjustable stopscrew f whereby the degree of motion of the valve is regulated in accordance with the charactcr of the materials being handled. The action of this screw is better illustrated in Fig. 6, in which the valve is shown in its 's provided with an arm 7, upon which is adjustably mounted a weight- (See Fig. 5). A hanger rod G has its lower end pivoted to the casting at g. and has its upper end secured to a rocker bar 9', which latter is supported in bearings on the stationary frame. It will be seen that this rocker bar g has a knife-edge contact portion adaptedcharged into the tank 'in the direction indicated by the arrow in Fig. 5, the water. sand and gravel nnplngeagalnst the face of the baftlc-plate-E, and the sand andgrarel are immediately, precipitated to the bottom ofthe ,,tank. he water. overflows from the tank and discharged therefrom by way of .the spqut D at the rear of the same. As soon'as theweight of the sand and gravel is sufiicientto ovr-balanCepthe weight f then the whole tank settles downward, caus-' ing the valve f to open and allow the contents to'dis'charge into a bin or other receptacle. As soon as the discharge of sand and gravel has taken place, the reduction in the weight of the tank and its contents serves automatically to then close the valve f, as-

the weight serves to raise the tank to its normal position, the leverageexcrted by the arm f being suliicient for this purpose. In

tank alternately rises and falls, and the sand and gravel are recovered from the muddy water. The water is discharged in one directionthat is to say, from the rear of the tankwhile the sand and gravel are discharged from the front of the tank in the other direction. In this way no fixed valves or equivalent devices are necessary, and no tilting motion is necessary for the tank. By causing the water and sand to discharge in opposite directions, no receiving-spouts or troughs are necessary, as the sand and gravel can be dumped or discharged directly into bins or other receptacles for this purpose. A

As shown in Fig. 4, the tank has straight sides, as distinguished from the downwardly tapering side walls of the tank shown in Fig. 1. Also in Fig. l the tank is provided with a plurality of valves H, which are in all respects the same as the one shown in theother figures, and above described. Further description of the multiple valve settling tank shown in Fig. 4: is, therefore, unnecessary. It may be stated, however, that by having a plurality of valves, the tank can be., !nade much larger and of considerable le'ngth. Also separate bins or receptacles can be provided for receiving the discharge from the difierent openings. With a tank of this kind, I find that the sand and gravel are efficiently and. satisfactorily separated from the water. No water, or at least very little, will be discharged by the valve, as the latter is very sensitive and closes promptly upon the slightest upward move- 'ment of the tank. It will be seen that the whereby the lifting power of the tank creases as it moves downwardethat n say, the power of the tank to lift the we -the maximum leverage being exerte( the first instance. This is of consider: advantage, inasmuch as when the valve 0 the weight of the tank is decreasing rapi owing to the discharge, and it is impou that this decrease in the weight does tend to prematurely stop the downw movement of the tank. In addition, the ward movement of the tank is effected by downward pull of the weight f, the lever at this time being exerted to the best vantage, as the lifting power or moveu of the weight is rapidl increasing, the m mum liftin power being exerted at instant of final closure, and the closure the valve being prompt andquick. W the tank. moves down, the moment fro! to f is increasing, while the moment f g to f is. decreasing; and this conditio: reversed when the weight f moves do The valve, it will be seen, is operated by weight of the tank upon which it is can I do not limit myself to the exact 4 struction shown and described.

What I claim as my invention is.

1. In a settling tank, a movable reccptz alever fulcrumed between its ends, nected at its shorter end for operating receptacle, an adjustable weight for longer end of said lever, a discharge oper for the receptacle, a valve for said dischz opening, a rigid connection between valve and lever, whereby the valve is o ated by movement of the receptacle,

valve having parallel axes one of whicl the fulcrum of said lever.

2. In a settling tank, a movable recept; a discharge opening for the low or end ther a. valve pivoted on the lower end of the ceptacle and normally closing said open a weight rigidly connected with said va adapted to keep the receptacle in a 1 mally raised position, a swinging hgir rod having its lower end pivotally connw to the valve and weight, a frame, a bar 5 ported on said rod, means for connect the upper .end of said frame with said whereby downward movement of the l'Cl tacle opens the valve to discharge the or gravel or other material from the bot thereof, said swinging hanger rod supp ing a part of the weight of the tank.

In a settling tank, two parallel horizontal axes of movement, a recept supported uponone axis in' such manner-1 the load thereof is substantially between two axes, a discharge valve for the lower 01 said receptacle, pivoted thereto, a hat rod depending from the other axis and oted at its lower end to'said valve, a wei rigid with said valve said weight disp( in position to utilize. the lower end of a E E I l i l l m6 as a fulcrum .to raise the receptacle and close the valve.

4. In a settling tank, a receptaclemounted to tilt about a horizontal axis, a hanger rod mounted to swing about a stationary axis at i its upper end, a link connection between the lower'end ofsaid rod and said receptacle, whereby the weight of said receptacle and its load'is imparted to said rod as 'a tensile 10 sti ain thereon, a valve operated by said' link connection, a counterbalanceepplied said I RAYMOND W. nULL; Witnesses:

O. ELMER TAYLOR, E. H. Cuzco. 

